Arrow 73009KZ Approved Catalytic Mid-Pipe – BMW C 650 Sport (2016-2020)

The Arrow 73009KZ link pipe is the catalytic and homologated central section of the Arrow exhaust system for the BMW C 650 Sport maxi-scooter from 2016 to 2020. It connects the headers to the Race-Tech silencer, also fits original headers, and weighs 0.5 kg. This variant ensures the system is road legal, unlike the racing link pipe. Product code 73009KZ.

✓ Strengths

• It is the homologated choice – on the official Arrow diagram, the 73009KZ is the "homologated catalytic link pipe" and bears the homologation mark; the alternative 73009MI is the racing link pipe and does not have that mark.
• Also fits original headers – Arrow explicitly states this at the bottom of the model's assembly diagram: no need to replace the entire system.
• Or with Arrow headers – on the diagram, the link pipe is also connected to the 73010MI racing headers, for those who want the complete system.
• Only 0.5 kg – this is the weight declared by Arrow for this code.
• Spring attachment – the piece has a welded hook on the body for the retaining spring.
• Natural, unpainted metal – it remains hidden under the scooter's bodywork, where heat resistance is more important than aesthetics.

Technical specifications

Vehicle compatibility

The list is taken from the official Arrow spare parts catalog. Always check your scooter's model and year before ordering.

Performance declared by Arrow

These are the values published by Arrow for the BMW C 650 Sport 2016-2020 and refer to the complete system, not just the link pipe.

Products listed in the catalog

• 73512AKN – the Race-Tech "Dark" aluminum silencer with carbon end cap, ECE homologated, to which this link pipe connects
• 73010MI – stainless steel racing headers, to complete the system upstream
• 73009MI – the racing central link pipe, the non-homologated variant of this part

Who it's perfect for

For those who install an Arrow silencer on their C 650 Sport and want to stay road legal. This is the crossroads of the system: at the same point, Arrow offers two link pipes, and the 73009KZ is the one with the catalytic converter and homologation mark, while the 73009MI is the racing one. Those who use the scooter in the city every day, pass inspections, and want no worries choose this one. Additionally, it weighs half a kilo and also fits standard headers, so you can start with just the silencer and complete the system later.

Frequently asked questions

Is the Arrow 73009KZ homologated?
Yes. On the official Arrow diagram for the BMW C 650 Sport 2016-2020, this code is indicated as "homologated catalytic link pipe" and has the homologation mark next to it. It is the variant designed for road use, unlike the 73009MI racing link pipe.

Does it fit original headers?
Yes. Arrow explicitly states this at the bottom of the model's assembly diagram: link pipes 73009MI and 73009KZ also fit original headers. Therefore, you don't need to replace the headers to use this link pipe.

What is the difference between 73009KZ and 73009MI?
They occupy the same position in the system, but on the Arrow diagram, the 73009KZ is the homologated catalytic link pipe, with the homologation mark next to the code, while the 73009MI is the racing link pipe and does not have that mark. Both also fit original headers.

Which silencer does it pair with?
With the Arrow silencer for the same motorcycle: on the assembly diagram, the link pipe is connected to the 73512AKN, the "Dark" aluminum Race-Tech with carbon end cap, ECE homologated. The silencer is not included in this item and must be purchased separately.

How much does it weigh and what are its measurements?
Arrow declares a weight of 0.5 kg. The body length and inlet/outlet diameters are not declared: on the technical sheet for the 73009KZ, those fields are zero, which is why we do not list them. There is no provision for a lambda sensor or CO sensor.

What changes in performance?
Arrow publishes for its system on the C 650 Sport 51 HP and 56.39 Nm compared to the 46 HP and 52.96 Nm of the standard system, with 4.41 kg less weight and 2 dB more noise (93 dB vs 91 at 3,750 rpm). These are values for the complete system, not just the link pipe.